| Patents for E21D 15 - Props; Chocks (3,432) |
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| 03/20/2013 | CN202810873U Pipe curtain connection buckle |
| 03/20/2013 | CN102979539A Three-purpose safety valve for single hydraulic prop |
| 03/20/2013 | CN102979538A Production method of plunger in individual hydraulic prop or piston rod of fully mechanized mining support upright column |
| 03/20/2013 | CN101832144B Narrow comprehensive mining hydraulic bracket |
| 03/13/2013 | CN202788886U Evacuating frame track set for down hole bracket evacuation |
| 03/13/2013 | CN202788885U Single hydraulic prop piston |
| 03/13/2013 | CN202788884U mine single hydraulic prop serial number management device |
| 03/13/2013 | CN202788883U Pi-type steel anti-inverted seat for high inclining-angle support |
| 03/13/2013 | CN202788882U Pedal device between high-inclining-angle supports |
| 03/13/2013 | CN202788881U Hydraulic support for mineral anti-corrosion monomer |
| 03/13/2013 | CN202788880U Hydraulic aqueous medium support for mineral anti-corrosion monomer |
| 03/13/2013 | CN202788879U Plunger-suspension-type mining single hydraulic prop |
| 03/13/2013 | CN202788878U Can pier column for coal mine tunnel support |
| 03/13/2013 | CN202788877U Horizontal-vertical loading tunnel combined type full space supporting and propping frame |
| 03/13/2013 | CN102966363A Prop drawing method for single hydraulic prop |
| 03/13/2013 | CN102966362A Structure for suspended hydraulic prop piston column |
| 03/13/2013 | CN102182478B Fast wave eliminating/energy dissipating/cushioning device for mining |
| 03/06/2013 | CN202768026U Hydraulic support dismounting machine |
| 03/06/2013 | CN202768025U Portable manual hydraulic temporary strut |
| 03/06/2013 | CN202768024U Mining pneumatic supporting pillar |
| 03/06/2013 | CN202768023U Reinforcing steel bar cover net for packed column with high water content materials |
| 03/06/2013 | CN102953741A Entrucking platform and support adjusting device for entrucking platform |
| 03/06/2013 | CN102953740A Voltage stabilization lifting support frame |
| 03/06/2013 | CN102191942B Full-automatic hydraulic prop |
| 02/27/2013 | CN202755994U Hollow hydraulic support vertical column and hydraulic support with same |
| 02/27/2013 | CN202755993U Safety valve used for hydraulic support |
| 02/27/2013 | CN202755992U Stop valve used for hydraulic support |
| 02/27/2013 | CN202755991U One-way pressure release valve used for hydraulic support |
| 02/27/2013 | CN202755990U Metal support capable of reflecting deformation stability of surrounding rock and contraction reasonability of support |
| 02/27/2013 | CN202755989U Stand column used for hydraulic support |
| 02/27/2013 | CN202755988U Novel single hydraulic prop plunger |
| 02/27/2013 | CN202755987U Connecting and improving structure for horizontal pieces and vertical pieces of large-scale mining module |
| 02/27/2013 | CN102943679A Hydraulic bracket and outer bottom adjusting mechanism of hydraulic bracket |
| 02/20/2013 | CN202745891U Gravity center stabilization device for hydraulic support |
| 02/20/2013 | CN202745890U Heavy hydraulic support assembling and disassembling device for mine |
| 02/20/2013 | CN202745889U Hydraulic support operating valve |
| 02/20/2013 | CN202745888U Safety valve |
| 02/20/2013 | CN202745887U Three-use valve for single hydraulic prop |
| 02/20/2013 | CN102168568B Novel hydraulic support upright post for surface preservative treatment and surface preservative treatment method thereof |
| 02/19/2013 | US8376319 Hydraulic jack capable of displaying load and overload warning |
| 02/14/2013 | US20130039704 Device for roof support of underground mine/tunnel |
| 02/13/2013 | CN202731951U Whole support frame dismantling and quick loading device for coal mine fully mechanized coal mining face |
| 02/13/2013 | CN202731950U Large-scale multifunctional separating-installing machine |
| 02/13/2013 | CN202731949U Hydraulic muck unloading frame anti-skidding clamp |
| 02/13/2013 | CN202731948U Prop valve outburst preventing device of hydraulic single prop |
| 02/13/2013 | CN202731947U Overload valve component of multiway valve |
| 02/13/2013 | CN202731946U Multiway valve |
| 02/13/2013 | CN202731945U Cable for underground coal mine tunnel U-shaped steel shed locking leg support |
| 02/13/2013 | CN202731944U Hinged type suspended hydraulic column |
| 02/13/2013 | CN202731943U U-shaped steel bracket manufactured by waste steel rail |
| 02/13/2013 | CN202731942U Super-soft ultra-thick coal seam large section open-off cut support device |
| 02/13/2013 | CN102922517A Log support manipulator |
| 02/13/2013 | CN102182476B Footstep applicable to hydraulic support with large-inclination working surface |
| 02/13/2013 | CN102022122B Support-type comprehensive tunneler |
| 02/12/2013 | US8371658 Apparatus and method for supporting a mine rib |
| 02/06/2013 | CN202718689U Shed erecting and beam mounting device for double T-steel shed used in tunnel of coal mine |
| 02/06/2013 | CN202718688U Support deviation control device for tunnel |
| 02/06/2013 | CN202718687U Split type connecting plate of reversing valve used for hydraulic support |
| 02/06/2013 | CN202718686U Reversing valve integral type multi-core control connecting plate for hydraulic support |
| 02/06/2013 | CN202718685U Large flow one-way lock |
| 02/06/2013 | CN202718684U Novel one-way lock |
| 02/06/2013 | CN202718683U Large-step support-moving rear anti-slip device |
| 02/06/2013 | CN202718682U Nitrogen safety valve for coal mine fully-mechanized mining hydraulic support |
| 02/06/2013 | CN202718681U Light bracket |
| 02/06/2013 | CN102913263A Self-filtering sliding valve type high-pressure pilot stop valve |
| 02/06/2013 | CN102913262A Novel hydraulic prop |
| 02/05/2013 | US8366077 Jack structure for a clutch |
| 01/30/2013 | CN202707107U Handlebar zero adjuster of hydraulic support |
| 01/30/2013 | CN202707090U Plate sealing device and hydraulic support |
| 01/30/2013 | CN202707089U Safety valve and hydraulic support |
| 01/30/2013 | CN202707088U Falling-prevention device of advanced support |
| 01/30/2013 | CN202707087U 拱形导向架 Arched guide frame |
| 01/30/2013 | CN102900444A Improved withdrawing technology for hydraulic supports on fully mechanized coal face |
| 01/30/2013 | CN102900443A Device for coordinating and controlling of deformation of roadway surrounding rocks |
| 01/30/2013 | CN102155244B Easy disassembly and assembly mining single hydraulic prop with warning function |
| 01/29/2013 | US8360396 Leverage tool for a crank assembly of a radar system |
| 01/23/2013 | CN202690088U Movable type hydraulic coal mine roadway support timbering machine |
| 01/23/2013 | CN202690087U Hydraulic prop with long stroke |
| 01/23/2013 | CN202690086U Flexible shield support frame with adjustable height |
| 01/23/2013 | CN102889089A Single-column type advance support device of blasting work surface |
| 01/23/2013 | CN102886226A Automatic proportioning device for mining emulsion |
| 01/16/2013 | CN202673307U Hydraulic support side guard plate assembly device for mine |
| 01/16/2013 | CN102877866A Double-injection double-seal pressure-display memory type single hydraulic prop |
| 01/16/2013 | CN102877865A Construction method for treating underground gob or cavity |
| 01/09/2013 | CN202659266U Controller for working face support |
| 01/09/2013 | CN202659260U Self-lifting type column shoe |
| 01/09/2013 | CN202659259U Mine hydraulic bracket with composite anti-corrosive system |
| 01/09/2013 | CN202659258U Mine hydraulic bracket with thermal spraying coating |
| 01/09/2013 | CN202659257U Single-control spray water valve for coal mine hydraulic support |
| 01/09/2013 | CN202659256U Long-distance single column drainage tool |
| 01/09/2013 | CN202659255U Anti-falling device for single hydraulic prop |
| 01/09/2013 | CN202659254U Energy-saving environment-friendly anticorrosion suspended hydraulic prop |
| 01/09/2013 | CN202659253U Energy conservation and environmental protection type corrosion resistance single hydraulic prop |
| 01/09/2013 | CN102182477B Mining method for mechanized mining working surface end and corresponding end support bracket |
| 01/03/2013 | WO2013000237A1 Stainless steel hydraulic upright post for mining and processing method thereof |
| 01/02/2013 | CN202645596U Hydraulic support column top disassembly and reassembly machine |
| 01/02/2013 | CN202645595U Hydraulic forepoling device |
| 01/02/2013 | CN102852537A Nickel-titanium alloy web membrane technology of single hydraulic prop for mine |
| 01/02/2013 | CN102852524A Method for utilizing hydraulic support to improve bauxite recovery rate |
| 01/02/2013 | CN102852523A Arrangement method of inversed S-shaped cut-eye on steeply inclined comprehensive caving working face |